تأثیر اسید‌شویی و تابش لیزر YAG: Nd در افزایش ظرفیت ذخیره‌سازی گاز هیدروژن در نانولوله‌های کربنی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه فیزیک، دانشگاه خلیج فارس، بوشهر، ایران

2 گروه شیمی، دانشگاه خلیج فارس، بوشهر، ایران

چکیده

در این پژوهش از نانولوله‌های کربنی چند جداره با قطر 30 تا 50 نانومتر و طول تقریبی 6 میکرون جهت ذخیره‌سازی گاز هیدروژن به روش حجم‌سنجی استفاده شد. ساختار، شکل و خواص فیزیکی نانولوله‌های کربنی به وسیله آنالیزهای پراش پرتو ایکس، میکروسکوپ الکترونی عبوری و آنالیز طیف‌سنجی تبدیل فوریه مادون قرمز مورد بررسی قرار گرفت. جهت بررسی ظرفیت ذخیره‌سازی هیدروژن در نانولوله‌های کربنی اثر دو پارامتر اسید ‌شویی و تابش لیزر یاگ مورد آزمایش قرار گرفت. نتایج به‌دست آمده نشان داد که اسید‌ شویی و تابش لیزر به‌ترتیب باعث افزایش 59 و 100 درصدی سطح ویژه نانولوله‌های کربنی می‌شود. همچنین بررسی‌ها نشان داد که نانولوله‌های کربنی خالص شده 0/3 درصد وزنی گاز هیدروژن را در خود ذخیره می‌کنند که افزایش 75 درصدی را نسبت به نانولوله‌های اولیه نشان می‌دهد. تابش لیزر با زمان‌های متفاوت باعث تغییر ظرفیت ذخیره‌سازی نانولوله‌ها شد که مقدار بهینه آن تابش 90 دقیقه لیزر بود و ظرفیت ذخیره‌سازی گاز هیدروژن در نانوله‌ها را به 1/1 درصد وزنی رساند. 

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

The Effect of Acid Washing and YAG:Nd Laser Irradiation on Increasing Hydrogen Storage Capacity in Carbon Nanotubes

نویسندگان [English]

  • M. Mehrabi 1
  • F. Shojaee 2
1 Physics Department, Persian Gulf University, Bushehr, P. O. Box: 7516913817, Iran
2 Chemistry Department, Persian Gulf University, Bushehr, P. O. Box: 7516913817, Iran
چکیده [English]

This research used multi-walled carbon nanotubes with a 30 to 50  nm diameter and an approximate length of 6  µm to store hydrogen gas by the volumetric method. Carbon nanotubes' structure, shape, and physical properties were investigated by X-ray diffraction analysis, transmission electron microscopy, and infrared spectroscopic analysis. To investigate the hydrogen storage capacity in carbon nanotubes, the effect of two parameters, namely acid washing and YAG: Nd laser irradiation, were studied. The results showed that acid washing and laser irradiation increased the specific surface area of carbon nanotubes by 59%  and 100%, respectively. Studies also showed that purified carbon nanotubes stored 0.3 wt.% hydrogen, which revealed a 75% increase compared to the original nanotubes. Also, laser irradiation with different times changed the storage capacity of nanotubes. The optimal value of laser irradiation was obtained to be 90  minutes, which increased the storage capacity of hydrogen gas in nanotubes to 1.1 wt.%.

کلیدواژه‌ها [English]

  • Carbon nanotubes
  • Acid washing
  • Laser
  • Hydrogen storage
  • Volumetric method

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مواد پیشرفته در مهندسی
دوره 42، شماره 3
آذر 1402
صفحه 17-29

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